[Devtools] Fixed Scroll issues with network exp timeline

third_party/WebKit/Source/devtools/front_end/network/networkLogView.css

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 642 matching lines @@
     text-align: center;
     line-height: 28px;
 }
 
 .network-timeline-header {
     position: absolute;
     border-left: 0px;
     width: 100%;
     display: table;
     z-index: 200;
-    background-color:transparent;
+    background-color: transparent;
 }
 
 .network-timeline-header:hover {
     background-color:hsla(0, 0%, 80%, .5);
 }
 
 .network-timeline-header div {
     display: table-cell;
     line-height: 14px;
     margin: auto 0px;
@@ skipping 25 matching lines @@
 
 .network-timeline-header .sort-ascending.sort-order-icon {
     display: block;
     background-position: -4px -111px;
 }
 
 .network-timeline-header .sort-descending.sort-order-icon {
     display: block;
     background-position: -20px -99px;
 }